Research Article
Determining the Effects of High Intensity Ultrasound on the Reduction of Microbes in Milk and Orange Juice Using Response Surface Methodology
Table 2
Estimated regression model of the relationship between response variable (
) and independent variables (
,
, and
).
| | Bacteria in milk | Spores in milk | Yeasts in OJ | | -value | Prob. | -value | Prob. > | -value | Prob. > |
| = time | 3.84 | 0.0735 | 5.63 | 0.0352 | 0.18 | 0.6775 | = temperature | 78.62 | 0.0001 | 53.58 | 0.0001 | 3622.7 | 0.0001 | = amplitude | 9.50 | 0.0095 | 59.02 | 0.0001 | 692.53 | 0.0001 | | 0.28 | 0.6034 | 8.15 | 0.0145 | 1.06 | 0.3241 | | 0.46 | 0.5086 | 0.12 | 0.7315 | 0.00 | 1.0000 | | 1.87 | 0.1961 | 2.09 | 0.1741 | 0.18 | 0.6775 | | 13.24 | 0.0034 | 10.51 | 0.0070 | 627.98 | 0.0001 | | 0.025 | 0.8776 | 9.40 | 0.0098 | 106.64 | 0.0001 | | 6.75 | 0.0233 | 4.28 | 0.0607 | 81.85 | 0.0001 |
|
|
= time (min), = temperature (°C), = amplitude, and = log reduction.
|